Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd52483da935e14f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-11 13:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97ff245a0a458610e7aae774f16eecf2 SHA-1: d9da217f896eb65c30508498c6c25c373392dd1e SHA-256: dd52483da935e14f7942c94da86ebb23092a4c767fa172afc4f90ef733641f15
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=ielts+answer+sheet+task+1+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document also contains a large number of embedded links, many of which point to Shopify domains hosting other PDF files, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=ielts+answer+sheet+task+1+pdf
    • http://dapufe.onesimplereality.com/uploads/1/3/1/3/131383483/luvevalewi.pdf
    • http://files.scottwarner.me/uploads/1/3/1/3/131380842/bimimeb.pdf
    • http://besogedo.swflcar.com/uploads/1/3/0/7/130776262/tewunugol.pdf
    • http://files.foundersbendhoa.org/uploads/1/3/0/7/130775304/gatirepovitaxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/aswamedham_poem_summary_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0437/1605/1112/files/l_tranger_albert_camus_livre.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3851/files/teacher_performance_evaluation_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8934/files/befakogipogapobogexe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/tulut.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/15000508572.pdf
    • https://cdn.shopify.com/s/files/1/0437/8833/7313/files/acces_canada_dossier__fournir.pdf
    • https://cdn.shopify.com/s/files/1/0431/6531/9324/files/loving_someone_with_borderline_personality_disorder_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/12855647932.pdf
    • https://cdn.shopify.com/s/files/1/0434/8516/7766/files/navafemo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/jazusupukujutelepefoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/6086/9785/files/xeguz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000645a.bin
0b47919eae57a6caec545d25c8b41bbe6435b7f18f632e52809f4b44d776b3a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x645A 5272 bytes
font_01_sfnt_off00007655.bin
29931e0deb852f5b757a2a97345319d49bcb8601442d804c898131de339b0a19
pdf-font-stream PDF embedded font (sfnt) at offset 0x7655 10252 bytes